patch 8.2.3280: 'virtualedit' local to buffer is not the best solution

Problem:    'virtualedit' local to buffer is not the best solution.
Solution:   Make it window-local. (Gary Johnson, closes #8685)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 5c925df..ebb408d 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -8643,7 +8643,7 @@
 
 					    *'virtualedit'* *'ve'*
 'virtualedit' 've'	string	(default "")
-			global or local to buffer |global-local|
+			global or local to window |global-local|
 	A comma separated list of these words:
 	    block	Allow virtual editing in Visual block mode.
 	    insert	Allow virtual editing in Insert mode.